It's Halloween night, and all the kids are dressed in scary andfunny costumes. Their trick-or-treat bags are getting heavier.
Nate the Great's good friend Rosamond isn't eating any of her treats. She's sad--and needs Nate's help. Her cat Little Hex is missing. Little Hex hates Halloween, so maybe he's hiding. Or is he lost? Nate and his trusty dog, Sludge, take the case and hunt in the night for Little Hex. They pass robots,pirates, and witches. But where will they find Little Hex?